US9048487B2 - Secondary battery and manufacturing method thereof - Google Patents

Secondary battery and manufacturing method thereof Download PDF

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Publication number
US9048487B2
US9048487B2 US13/051,981 US201113051981A US9048487B2 US 9048487 B2 US9048487 B2 US 9048487B2 US 201113051981 A US201113051981 A US 201113051981A US 9048487 B2 US9048487 B2 US 9048487B2
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Prior art keywords
electrode
separator
outer portion
electrode plate
joining part
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Expired - Fee Related, expires
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US13/051,981
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US20120064385A1 (en
Inventor
Yongkyun PARK
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Samsung SDI Co Ltd
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Samsung SDI Co Ltd
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Priority to US13/051,981 priority Critical patent/US9048487B2/en
Assigned to SAMSUNG SDI CO., LTD. reassignment SAMSUNG SDI CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Park, Yongkyun
Priority to KR1020110066580A priority patent/KR101318598B1/ko
Priority to JP2011168128A priority patent/JP5560243B2/ja
Priority to EP11180796A priority patent/EP2429012A1/en
Priority to CN201110281451.3A priority patent/CN102412379B/zh
Publication of US20120064385A1 publication Critical patent/US20120064385A1/en
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    • H01M2/14—
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0468—Compression means for stacks of electrodes and separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H01M2/0212—
    • H01M2/18—
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • H01M50/466—U-shaped, bag-shaped or folded
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49108—Electric battery cell making
    • Y10T29/49112—Electric battery cell making including laminating of indefinite length material

Definitions

  • aspects of embodiments of the present invention relate to a secondary battery and a manufacturing method thereof.
  • Secondary batteries may be manufactured by spirally winding a positive electrode plate coated with a positive electrode active material, a separator, and a negative electrode plate coated with a negative electrode active material, or by housing an electrode assembly formed by sequentially stacking a positive electrode plate coated with a positive electrode active material, a separator, and a negative electrode plate coated with a negative electrode active material.
  • secondary batteries may be classified into cylindrical types, prismatic types, or pouch types according to the external shape of a case accommodating the electrode assembly.
  • the stacked positive and negative electrode plates may move or deform due to external impact or vibration, resulting in misalignment.
  • a secondary battery and a method of manufacturing the secondary battery can maintain a positive electrode plate and a negative electrode plate in proper alignment even when an external impact or vibration is applied to an electrode assembly.
  • a secondary battery includes: an electrode assembly including a first electrode plate including a first electrode collector and a first electrode tab protruding from a side of the first electrode collector; a second electrode plate including a second electrode collector and a second electrode tab protruding from a side of the second electrode collector; a first separator between the first electrode plate and the second electrode plate and including a central portion and an outer portion at a periphery of the central portion; and a second separator at a side of the first electrode plate or the second electrode plate opposite a side facing the first separator, the second separator including a central portion and an outer portion at a periphery of the central portion of the second separator, and the outer portion of the first separator and the outer portion of the second separator contact each other at least at a joining part; and a case containing the electrode assembly.
  • the joining part may contact at least one of the first and second electrode plates. In one embodiment, the joining part fixes at least one of the first and second separators and the at least one of the first and second electrode plates together.
  • the central portion of at least one of the first and second separators may contact at least one of the first and second electrode collectors.
  • the joining part includes at least one first joining part at a first side of the outer portion of at least one of the first and second separators and at least one second joining part at a second side of the outer portion of the at least one of the first and second separators opposite the first side.
  • the first side may be adjacent one or both of the first and second electrode collectors.
  • the at least one first joining part may include a pair of first joining parts at opposite sides along a widthwise direction of an electrode tab of the first and second electrode tabs.
  • the at least one first joining part includes a first pair of first joining parts at opposite sides along a widthwise direction, respectively, of the first electrode tab and contacting side portions of the first electrode tab and the side of the first electrode collector; and a second pair of first joining parts at opposite sides along a widthwise direction, respectively, of the second electrode tab and contacting side portions of the second electrode tab and the side of the second electrode collector.
  • the at least one second joining part may be at a central portion of the second side of the outer portion.
  • the at least one second joining part includes a pair of second joining parts at opposite ends of the second side intersecting third and fourth sides, respectively, of the outer portion of the at least one of the first and second separators, the third and fourth sides being opposite each other and connecting the first and second sides of the outer portion of the at least one of the first and second separators.
  • the joining part may include an ultrasonic welded part, a thermally fused part, or an adhesive.
  • the first and second electrode collectors may be substantially plate-shaped and have substantially a same size. In one embodiment, at least one of the first and second separators is substantially plate-shaped, the central portion has a size corresponding to the size of the first and second electrode collectors, and the outer portion does not overlap the first and second electrode collectors.
  • the case may be a pouch-type case.
  • a secondary battery further includes an insulation film between the case and at least one of the first and second electrode tabs.
  • a method of manufacturing a secondary battery includes: preparing a first electrode plate including a first electrode collector and a first electrode tab protruding from a side of the first electrode collector; preparing a second electrode plate including a second electrode collector and a second electrode tab protruding from a side of the second electrode collector; preparing a first separator including a central portion and an outer portion at a periphery of the central portion; preparing a second separator including a central portion and an outer portion at a periphery of the central portion of the second separator; stacking the first electrode plate, the first separator, the second electrode plate, and the second separator, the first separator being between the first and second electrode plates, and the second separator being at a side of the first electrode plate or the second electrode plate opposite a side facing the first separator; and preparing a joining part at which the outer portion of the first separator and the outer portion of the second separator contact each other.
  • Preparing the joining part may include ultrasonic welding, thermal fusing, or applying an adhesive. Preparing the joining part may include contacting the joining part to at least one of the first and second electrode plates.
  • the joining part includes a plurality of joining parts, and preparing the joining part includes preparing at least one first joining part of the plurality of joining parts at a first side of the outer portion of at least one of the first and second separators, and preparing at least one second joining part of the plurality of joining parts at a second side of the outer portion of at least one of the first and second separators opposite the first side.
  • a secondary battery includes an electrode assembly including a positive electrode plate having a positive electrode tab, a negative electrode plate having a negative electrode tab, and a separator interposed between the positive electrode plate and the negative electrode plate and having a central portion contacting the positive electrode plate or the negative electrode plate, and an edge portion extending outwardly from the central portion, a case for housing the electrode assembly, an upper welding part formed on an upper edge portion, where the positive electrode tab and the negative electrode tab are positioned, and a lower welding part formed on a lower edge portion opposite to the upper edge portion.
  • At least four of the upper welding part may be formed to contact side portions of each of the positive electrode tab and the negative electrode tab.
  • the upper welding part may be formed to contact the upper sides of the positive electrode plate and the negative electrode plate.
  • the lower welding part may be formed at the center of the lower edge portion.
  • the lower welding part may be formed to contact lower corners of the positive electrode plate or the negative electrode plate, respectively.
  • the upper welding part and the lower welding part may be subjected to ultrasonic welding.
  • the case may be a pouch-type case.
  • a method of manufacturing a secondary battery includes an electrode plate preparing step of preparing a positive electrode plate having a positive electrode tab and a negative electrode plate having a negative electrode tab; a separator preparing step of preparing a separator having a central portion contacting the positive electrode plate or the negative electrode plate, and an edge portion extending outwardly from the central portion, and including an upper welding part formed on an upper edge portion, where the positive electrode tab and the negative electrode tab are positioned, and a lower welding part formed on a lower edge portion opposite to the upper edge portion; a stacking step of stacking the positive electrode plate, the negative electrode plate, and the separator; a welding step of welding the upper welding part and the lower welding part, respectively; and a housing step of housing a completed electrode assembly resulting after the welding step.
  • the electrode assembly can maintain alignment between a first electrode plate and a second electrode plate even during an external impact or vibration, and, as a result, the cell stability of the battery can be enhanced while improving the life characteristic of the battery.
  • FIG. 1 is an exploded perspective view of a secondary battery according to an embodiment of the present invention
  • FIG. 2 is a front view of an electrode assembly of the secondary battery of FIG. 1 according to an embodiment of the present invention
  • FIG. 3 is an exploded perspective view of the electrode assembly of FIG. 2 ;
  • FIG. 4 is a front view of an electrode assembly of a secondary battery according to another embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating a method of manufacturing a secondary battery according to an embodiment of the present invention.
  • Secondary Battery 110 Electrode Assembly 120: First Electrode Plate 130: Second Electrode Plate 140: Separator 150: Joining Part
  • FIG. 1 is an exploded perspective view of a secondary battery according to an embodiment of the present invention
  • FIG. 2 is a front view of an electrode assembly of the secondary battery shown in FIG. 1 according to an embodiment of the present invention
  • FIG. 3 is an exploded perspective view of the electrode assembly shown in FIG. 2 .
  • a secondary battery 100 includes an electrode assembly 110 and a case 170 .
  • the electrode assembly 110 includes a first electrode plate 120 (e.g., a positive electrode plate), a second electrode plate 130 (e.g., a negative electrode plate), a separator 140 , and a joining part 150 .
  • the electrode assembly 110 in one embodiment, further includes an insulation film 160 .
  • the first electrode plate 120 is formed by coating a first electrode active material layer 122 (e.g., a positive electrode active material layer) on both surfaces of a substantially plate-shaped first electrode collector 121 (e.g., a positive electrode collector).
  • the first electrode collector 121 may be made of aluminum foil having excellent conductivity.
  • the first electrode plate 120 includes a first electrode tab 123 (e.g., a positive electrode tab) in the form of a protrusion on a side portion of the first electrode collector 121 , and the first electrode active material layer 122 is coated on parts of the first electrode collector 121 excluding the first electrode tab 123 and predetermined portions under the first electrode tab 123 .
  • the first electrode active material layer 122 may be made of a laminate compound including lithium, a binder for increasing a binding force, and a conductive member for increasing conductivity.
  • the second electrode plate 130 is formed by coating a second electrode active material layer 132 (e.g., a negative electrode active material layer) on both surfaces of a second electrode collector 131 (e.g., a negative electrode collector) that is substantially plate-shaped to correspond to the first electrode collector 121 .
  • the second electrode collector 131 may be made of copper (Cu) foil having excellent conductivity.
  • the second electrode plate 130 includes a second electrode tab 133 (e.g., a negative electrode tab) in the form of a protrusion on a side portion of the second electrode collector 131 , and the second electrode active material layer 132 is coated on parts of the second electrode collector 131 excluding the second electrode tab 133 and predetermined portions under the second electrode tab 133 .
  • the second electrode active material layer 132 may be made of a hard carbon material including carbon or graphite, and a binder for increasing a binding force.
  • the second electrode tab 133 is spaced apart from the first electrode tab 123 .
  • the separator 140 is substantially plate-shaped to correspond to the first electrode plate 120 and/or the second electrode plate 130 and is generally sized to be slightly larger than the first electrode plate 120 and/or the second electrode plate 130 .
  • the separator 140 may be a porous film made of polyethylene (PE), polypropylene (PP), or a composite film thereof.
  • the separator 140 which is interposed between the first electrode plate 120 and the second electrode plate 130 , electrically insulates the first electrode plate 120 and the second electrode plate 130 and passes charges of the first electrode plate 120 and the second electrode plate 130 .
  • the separator 140 is positioned between the first electrode plate 120 and the second electrode plate 130 , and includes a central portion 142 contacting the first electrode plate 120 and/or the second electrode plate 130 , and an edge portion 144 extending outwardly from the central portion 142 while not overlapping the first electrode plate 120 or the second electrode plate 130 . Further, the separator 140 (e.g., a first separator) may be adjacent another separator 140 (e.g., a second separator) that is arranged at a side of the first electrode plate 120 or the second electrode plate 130 opposite a side facing the separator 140 (i.e. the first separator).
  • a first separator may be adjacent another separator 140 (e.g., a second separator) that is arranged at a side of the first electrode plate 120 or the second electrode plate 130 opposite a side facing the separator 140 (i.e. the first separator).
  • the edge portion 144 in one embodiment, includes an upper edge portion 144 a formed on an upper side of the central portion 142 , a lower edge portion 144 b formed on a lower side of the central portion 142 , and left and right edge portions 144 c and 144 d formed on left and right sides, respectively, of the central portion 142 .
  • the joining part 150 in one embodiment, includes an upper joining part 152 and a lower joining part 154 .
  • the upper joining part 152 in one embodiment, is formed on the upper edge portion 144 a where the first electrode tab 123 and the second electrode tab 133 are arranged.
  • the upper joining part 152 is formed at locations corresponding to side portions (e.g., opposite side portions) of the first electrode tab 123 and side portions (e.g., opposite side portions) of the second electrode tab 133 , so that at least four upper joining parts are formed.
  • the upper joining part 152 in one embodiment, is formed to contact upper sides of the first electrode plate 120 and/or the second electrode plate 130 while contacting side portions (e.g., opposite side portions) of each of the first electrode tab 123 and the second electrode tab 133 .
  • the lower joining part 154 in one embodiment, is formed at or near the center of the lower edge portion 144 b opposite to the upper joining part 152 .
  • the lower joining part 154 in one embodiment, is formed to contact lower sides of the first electrode plate 120 and/or the second electrode plate 130 .
  • the upper joining part 152 and the lower joining part 154 are subjected to ultrasonic welding, respectively, thereby tightly fixing the stacked structure of the first electrode plate 120 , the second electrode plate 130 , and the separator 140 .
  • the upper joining part 152 and the lower joining part 154 are not limited to an ultrasonic welded part in embodiments of the present invention, but may be formed by any other suitable welded part, a thermally fused part, or an adhesive.
  • the separator 140 i.e. the first separator
  • the adjacent separator 140 i.e. the second separator
  • the first electrode plate 120 and/or the second electrode plate 130 can be prevented or substantially prevented from moving to the sides (e.g., left and right), such as due to an external impact or vibration.
  • the upper sides of the first electrode plate 120 and/or the second electrode plate 130 are fixed by the upper joining part 152 , the first electrode plate 120 and/or the second electrode plate 130 can be prevented or substantially prevented from moving upward.
  • the first electrode plate 120 and/or the second electrode plate 130 can be prevented or substantially prevented from moving downward, such as due to an external impact or vibration.
  • the lower joining part 154 may be positioned at any suitable location of the lower edge portion 144 b as long as it is positioned within an intersecting region of the left and right edge portions 144 c and 144 d . In one embodiment, in order to fix the first electrode plate 120 and/or the second electrode plate 130 in a stable manner, the lower joining part 154 is positioned substantially at a center of the left and right edge portions 144 c and 144 d.
  • the insulation film 160 is configured to enclose the case 170 (e.g., a pouch-type case) described further below and the first electrode tab 123 and the second electrode tab 133 stacked for electrical insulation.
  • the case 170 e.g., a pouch-type case
  • the case 170 will be described with regard to a pouch-type case according to one example embodiment of the present invention. However, embodiments of the present invention are not limited to a pouch-type case, and the case 170 may be formed of a cylindrical or prismatic can or case.
  • the case 170 in one embodiment, includes a body 172 having an inner space in which the electrode assembly 110 is placed and having an electrolyte filled therein, and a cover 174 integrally extending from one end of the body 172 .
  • a flange 176 is formed at an edge of the body and is joined with the cover 174 to hermetically seal the body 172 .
  • the joining part 150 in the separator 140 due to the joining part 150 in the separator 140 , when an external impact or vibration is applied to the electrode assembly 110 , alignment between the first electrode plate 120 and the second electrode plate 130 can be maintained and the stability of the battery cell can be enhanced while improving the life characteristic of the battery.
  • FIG. 4 is a front view of an electrode assembly of a secondary battery according to another embodiment of the present invention.
  • lower joining parts 254 are formed at intersections of the lower edge portion 144 b and the left and right edge portions 144 c and 144 d , respectively. That is, the lower joining parts 254 are formed around lower corners of both sides of the first electrode plate ( 120 of FIG. 3 ) and/or the second electrode plate ( 130 of FIG. 3 ). In an exemplary embodiment, the lower joining parts 254 are formed to contact lower corners of both sides of the first electrode plate 120 and/or the second electrode plate 130 .
  • first electrode plate 120 , the second electrode plate 130 , and the separator 140 are stacked, and joining is performed on the upper joining part 152 and the lower joining part 254 , left and right and downward movements of the first electrode plate 120 and/or the second electrode plate 130 can be prevented or substantially prevented by the lower joining part 254 .
  • FIG. 5 is a flowchart illustrating a method of manufacturing a secondary battery according to an embodiment of the present invention.
  • an assembly for preventing or substantially preventing an electrode from moving may include a first (e.g., positive) and second (e.g., negative) electrode plate preparing step (S 1 ), a separator preparing step (S 2 ), a stacking step (S 3 ), a joining step (S 4 ), and a housing step (S 5 ).
  • the above-described steps of the method of manufacturing a secondary battery according to the present invention is not limited to carrying out the above-described steps, or tasks, in the above-listed order or as shown in FIG. 5 .
  • the first (e.g., positive) and second (e.g., negative) electrode plate preparing step (S 1 ) may be performed after the separator preparing
  • the first electrode plate 120 having the first electrode collector 121 , the first electrode active material layer 122 and the first electrode tab 123 , and the second electrode plate 130 having the second electrode collector 131 , the second electrode active material layer 132 and the second electrode tab 133 , are prepared.
  • the separator 140 including the central portion 142 which is an overlapping area with the first electrode plate 120 and/or the second electrode plate 130 , and the edge portion 144 extending outwardly from the central portion 142 , is prepared.
  • the separator 140 has the upper joining part 152 formed on the upper edge portion 144 a of the edge portion 144 , where the first electrode tab 123 and the second electrode tab 133 are positioned, and the lower joining part 154 formed on the lower edge portion 144 b opposite to the upper edge portion 144 a .
  • the joining part 150 is yet to be formed in this step.
  • the first electrode plate 120 , the second electrode plate 130 , and the separator 140 provided through the first and second electrode plate preparing step (S 1 ) and the separator preparing step (S 2 ) are stacked. That is to say, the separator 140 is interposed between the first electrode plate 120 and the second electrode plate 130 and aligned with respect to (e.g., aligned on centers of) the respective electrode plates for stacking.
  • the upper joining part 152 and the lower joining part 154 are joined, respectively, such as by welding (e.g., ultrasonic welding), thermal fusing, or applying an adhesive.
  • the joining may be ultrasonic welding, but the type of the joining is not limited to ultrasonic welding.
  • the completed electrode assembly 110 resulting after the joining step (S 4 ) is housed in the case 170 , and an electrolyte is injected into the case 170 , followed by hermetically sealing.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Cell Separators (AREA)
US13/051,981 2010-09-13 2011-03-18 Secondary battery and manufacturing method thereof Expired - Fee Related US9048487B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US13/051,981 US9048487B2 (en) 2010-09-13 2011-03-18 Secondary battery and manufacturing method thereof
KR1020110066580A KR101318598B1 (ko) 2010-09-13 2011-07-05 이차전지 및 그 제조방법
JP2011168128A JP5560243B2 (ja) 2010-09-13 2011-08-01 二次電池及びその製造方法
EP11180796A EP2429012A1 (en) 2010-09-13 2011-09-09 Secondary battery
CN201110281451.3A CN102412379B (zh) 2010-09-13 2011-09-09 二次电池及其制造方法

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US38239210P 2010-09-13 2010-09-13
US13/051,981 US9048487B2 (en) 2010-09-13 2011-03-18 Secondary battery and manufacturing method thereof

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US20120064385A1 US20120064385A1 (en) 2012-03-15
US9048487B2 true US9048487B2 (en) 2015-06-02

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9793571B2 (en) 2013-10-03 2017-10-17 Nissan Motor Co., Ltd. Apparatus for bonding separators in electrical devices
EP3161899A4 (en) 2014-06-30 2017-12-27 Black & Decker Inc. Battery pack for a cordless power tools
WO2016056256A1 (ja) 2014-10-10 2016-04-14 住友化学株式会社 電池用セパレータ捲回体の製造方法、電池用セパレータ捲回体、および電池用セパレータ捲回体の製造装置
CN105655531B (zh) * 2014-11-10 2018-08-10 东莞新能源科技有限公司 电芯及电化学装置
JP6693840B2 (ja) * 2016-08-31 2020-05-13 京セラ株式会社 フロー電池
CN109213339B (zh) * 2017-07-03 2022-01-25 群光电子股份有限公司 端面接触式充电模块及其触控笔

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136886A2 (en) 1983-09-30 1985-04-10 Union Carbide Corporation Electrode assembly
JPH07326336A (ja) 1994-05-31 1995-12-12 Sony Corp 二次電池
JPH0896829A (ja) 1994-09-22 1996-04-12 Sony Corp 二次電池
JP2002208442A (ja) 2001-01-11 2002-07-26 Tdk Corp 電気化学デバイス
US20020182490A1 (en) * 2000-09-25 2002-12-05 Cho Su Yung Pocketed electrode plate for use in lithium ion secondary battery ,its manufacturing method and lithium ionn secondary battery using the same
JP2004158344A (ja) 2002-11-07 2004-06-03 Nissan Motor Co Ltd ラミネート二次電池、複数のラミネート二次電池からなる組電池モジュール、複数の組電池モジュールからなる組電池ならびにこれらいずれかの電池を搭載した電気自動車
US20050277022A1 (en) 2004-06-14 2005-12-15 Matsushita Electric Industrial Co., Ltd. Electrochemical element
EP1708214A2 (en) 2005-03-30 2006-10-04 TDK Corporation Electrochemical device
US20070099071A1 (en) 2005-11-02 2007-05-03 Cardiac Pacemakers, Inc. System and method for sealing battery separator
WO2007114579A1 (en) 2006-04-03 2007-10-11 Lg Chem, Ltd. Lithium secondary battery improved safety and capacity
JP2007299855A (ja) 2006-04-28 2007-11-15 Nec Tokin Corp 積層型電気化学デバイス
DE102007025766A1 (de) 2007-05-23 2008-11-27 Varta Microbattery Gmbh Galvanisches Element mit Sicherungsfunktion
US20080292962A1 (en) * 2007-05-21 2008-11-27 Dong-Woo Jung Pouch-type secondary battery
JP2009218540A (ja) 2008-03-12 2009-09-24 Office Emd Kk 蓄電装置
JP2009283141A (ja) 2008-05-19 2009-12-03 Nissan Motor Co Ltd 積層型電池の製造方法
US20090297929A1 (en) 2008-05-29 2009-12-03 Sony Corporation Winding electrode body, nonaqueous electrolyte secondary battery, and method for manufacturing winding electrode body
JP2010020974A (ja) 2008-07-09 2010-01-28 Sharp Corp 扁平型二次電池およびその製造方法
WO2010089152A1 (de) 2009-02-09 2010-08-12 Varta Microbattery Gmbh Knopfzellen und verfahren zu ihrer herstellung

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136886A2 (en) 1983-09-30 1985-04-10 Union Carbide Corporation Electrode assembly
JPH07326336A (ja) 1994-05-31 1995-12-12 Sony Corp 二次電池
JPH0896829A (ja) 1994-09-22 1996-04-12 Sony Corp 二次電池
US20020182490A1 (en) * 2000-09-25 2002-12-05 Cho Su Yung Pocketed electrode plate for use in lithium ion secondary battery ,its manufacturing method and lithium ionn secondary battery using the same
JP2002208442A (ja) 2001-01-11 2002-07-26 Tdk Corp 電気化学デバイス
JP2004158344A (ja) 2002-11-07 2004-06-03 Nissan Motor Co Ltd ラミネート二次電池、複数のラミネート二次電池からなる組電池モジュール、複数の組電池モジュールからなる組電池ならびにこれらいずれかの電池を搭載した電気自動車
US20050277022A1 (en) 2004-06-14 2005-12-15 Matsushita Electric Industrial Co., Ltd. Electrochemical element
JP2005353519A (ja) 2004-06-14 2005-12-22 Matsushita Electric Ind Co Ltd 電気化学素子
EP1708214A2 (en) 2005-03-30 2006-10-04 TDK Corporation Electrochemical device
US20070099071A1 (en) 2005-11-02 2007-05-03 Cardiac Pacemakers, Inc. System and method for sealing battery separator
WO2007114579A1 (en) 2006-04-03 2007-10-11 Lg Chem, Ltd. Lithium secondary battery improved safety and capacity
JP2009532843A (ja) 2006-04-03 2009-09-10 エルジー・ケム・リミテッド 安全性及び容量が改善されたリチウム二次電池
US20100055558A1 (en) 2006-04-03 2010-03-04 Lg Chem, Ltd. Linthium secondary battery improved safety and capacity
JP2007299855A (ja) 2006-04-28 2007-11-15 Nec Tokin Corp 積層型電気化学デバイス
US20080292962A1 (en) * 2007-05-21 2008-11-27 Dong-Woo Jung Pouch-type secondary battery
DE102007025766A1 (de) 2007-05-23 2008-11-27 Varta Microbattery Gmbh Galvanisches Element mit Sicherungsfunktion
JP2009218540A (ja) 2008-03-12 2009-09-24 Office Emd Kk 蓄電装置
JP2009283141A (ja) 2008-05-19 2009-12-03 Nissan Motor Co Ltd 積層型電池の製造方法
US20090297929A1 (en) 2008-05-29 2009-12-03 Sony Corporation Winding electrode body, nonaqueous electrolyte secondary battery, and method for manufacturing winding electrode body
JP2010020974A (ja) 2008-07-09 2010-01-28 Sharp Corp 扁平型二次電池およびその製造方法
US20110129722A1 (en) 2008-07-09 2011-06-02 Tetsuya Yoneda Flat secondary battery and method of manufacturing the same
WO2010089152A1 (de) 2009-02-09 2010-08-12 Varta Microbattery Gmbh Knopfzellen und verfahren zu ihrer herstellung

Non-Patent Citations (8)

* Cited by examiner, † Cited by third party
Title
Extended European Search Report dated Nov. 4, 2011 in EP application 11180796.2, 8 pages.
JPO Notice of Allowance dated May 13, 2014, for corresponding Japanese Patent application 2011-168128, (3 pages).
JPO Office action dated Jun. 18, 2013, for corresponding Japanese Patent application 2011-168128, (3 pages).
Patent Abstracts of Japan, and English machine translation for Japanese Publication 2009-283141 dated Dec. 3, 2009, listed above, (14 pages).
Patent Abstracts of Japan, and English machine translation of Japanese Publication 08-096829, dated Apr. 12, 1996, (7 pages).
Patent Abstracts of Japan, and English machine translation of Japanese Publication 2002-208442, dated Jul. 26, 2002, (16 pages).
Patent Abstracts of Japan, and English machine translation of Japanese Publication 2004-158344, dated Jun. 3, 2004, (19 pages).
SIPO Office action dated Nov. 1, 2013, for corresponding Chinese Patent application 201110281451.3, (9 pages).

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CN102412379B (zh) 2014-12-24

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